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R = R1 + R2 + R3 + R4
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U1 = R1I; U2 = R2I; U3 = R3I; U4 = R4I;
) : U = U1 + U2 + U3 + U4.
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I = I1 + I2;
G, , , .. G = 1 / R. ().
G1 G2, G(. ) :
G1 = I1 / U; G2 = I2 / U; G = I / U = G1 + G2,
G = 1 / R; G1 = 1 / (R2 + R3); G2 = 1 / (R5 + R6).
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